Grinding-machine.



P A. SOLEM.

GRINDING MACHINE.

urmonron FILED 11mm, 1910.

1,016,585., Patented Feb. 6,1912.

QSHEETS-SHEET 1.

\Afimcsszs INVENTUR P.x A. SDI-BM.

GRINDING MACHINE. APPLICATION FILED 11mm, 1910.

1,0I,6,5 Patented Feb. 6, 1912.

6 SHBET8-SHBET 2.

,4 I .I 6 -93 36 a0 49 8 \AATNESSES INVE TUH Patented Feb. 6, 1912..

6 SHEETS-SHEET 3.

NVEINTEIR P. A. SOLBM.

GRINDING MAGHINB. APPLICATION FILED 1mm 9, 1910.

e SHEETS-SHEET 4.

1,016,585. Patented Feb. 6, 1912.

\A/ITNEESES. INVENTEIR.

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P, A. NOLEM.

GRINDING MACHINE.

APPLIOATION FILED JUNE 9, 1910.

Patented Feb.6,1912.

s SHEETS-SHEET a. 84

MNEESEE INVENTEIR v P. A, scram. GRINDING MACHINE.

APPLICATION FILED JUNE 9, 1910. 1,01 6,5; Patented Feb. 6, 1912.

6 SHEETS-SHEET 6.

\A/ITNESEEE INVENTUR UNITED STATES PATENT OFFICE. rn'rnn. A. SOLEM, or oniomna'rr, onto, ASSIGNOB, '10 J, A. FAY a EGAN eomnw, OF

- omcmnarr, OHIO, A conrona rion or WEST vracxma.

GRINDING-MACHINE.

Specification of Letters Patent.

Application filed June 9, 1910. serial No. 566,126.

chines for grinding or Sharpening knives used in connection with wood working'ma chinery, and it consists principallyof' an adjustable knife holding bar arranged 'to accommodate either regular slotted knives, or what is known as high speed knives which consist of plain thin strips ofsteel.

It is a well known fact that planer knives never have an absolutelytrue surface and that on this-account it is vim ossible to set a knife on a machine twice n exactly the same relative position. If, therefore, when a knife is ground'on one side it is reset on the work support for grinding the opposite side, the second bevel will not .be' exactly parallel to the first and the cutting edge will not be an absolutely straight line. This difiiculty is overcome and much time saved by grinding'both sidesof the knife without changin its-position on the work support.

The 0 ject of my invention is to provide a machine with a single grinding wheel and a knife holding bar arranged to accom modate either slotted or high speed knives,

' and in mounting the knife holding bar on the reciprocating carriage so that it may be adjusted into positions for grinding a knife from either one or both sides without changin its position on the knife holding bar.

. he invention'will be readily understood from the following description and claims, and from the drawmgs in which latter:

Figure 1 is a front elevation of my improved machine. Fig. 2 is a left hand side elevation of the same with the knife holding ed 0 of the knife holding bar adjusted above t e plane of its axis. Fig. 3 is' a rear elevation of the machine. Flg. 4 is. a

right hand side elevation with the knife edge of the knife holding'bar ad-.

holdin justed low the lane of its axis. In this viewthe side 0 the machine is partly broken away for better illustration. Fig. 5 is a plan view of the knife holding bar and carnage Fig. '6 is a cross section of the knife holding bar on line a a of Fig. 5. Fig.

nism for the grinding wheel. Figs. 8 and 9 are details of an automatic belt shifting device. Fig. 10 is a cross section of a-knife ground with a bevel from each face of the knife to the cutting edge thereof.

1 represents the main frame of the machine on which is mounted the reciprocating grinding head 2, in ways 33 having upwardly extending arms 4 and 5, in which is journaled the mandrel 6, fast upon one end of which outside of the arm 5 1s the grinding wheel 7. Tightly secured on the oppo-.

site end of the mandrel 6 is the pulley 8 which carries a belt from the pulley the lower part of the main frame 1.

11 is a pulley loosely mounted on the main feed shaft 10. The machine is driven by a belt operating on the pulleys 9 and 11, said belt being controlled by the shifter 12, having arms 13 and 14.. The shifter 12 is actuated by means of the lever 15 fulcrumed in the lug 16 on the main frame 1.

'17 is a carriage support mounted on the main frame 1 and rigidly secured thereto by any suitable means as by bolts 18. 19 is a reciprocating carriage sliding on ways 20 and .21 on the carriage support 17. Pivotally mounted in the carriage 19 is a knife holding bar 22 provided at either end with segments 23 having therein segment slots 24. m

25 represents bolts passing through holes 26 in the endof the carriage and throu h slots 24. By loosening the bolts 25 the knife either face of the knife, 9. er which the bolt 25 may be again tightened and the bar Patented Feb. 6, 1912. p

9 which is tight' on the main feed shaft 16" which is journaled in suitable hearings in 'l/ v is'a sectional view ofthe feeding mechathereby rigidly secured in its adjusted position.

The knife holding bar 22 is provided with clampsections 28 for clamping the knife on the knife holding bar 22. The clamps completely' cover the knife holding face of the 1 bar and protect the face of the bar and the knife from the water and particles of it thrown off by the grinding wheel. he knife to be ground is placed on the face of the bar 22 and is clamped into position by the clamps 28 as shown in Fig. 6.

29-is a bolt passing through the clamp secthe travelof the carriage is again reversed.

of the main frame 1 and. the rear end is sup- I SH 0rt.

30 is a set screw passing through the rear end of the clamp sections 28 taking against the face of the bar22. The set screw 30 isprovided for holding the rear end of the clamp sections 28 in the same relative plane as the forward end which is in contact with the knife.

31 is a shaft journaled in suitable bearings on which is secured the worm 32 engaging the worm wheel 33, on the vertical shaft 34, on which is a pinion 35, engaging the rack 36 on the reciprocating carriage 19. I provide a cover for the worm and worm wheel which is partly broken away in the views I have shown for better illustration.

37, 38 and 39 are pulleys on the shaft 31, 37 and 39 being loosely mounted thereon and 38 bein secured to the shaft.

40 is a pu ley secured on the mandrel 6 between the arms 4 and 5 and is connected with pulleys 37, 38 and 39 by means of a crossed belt 41 and an open belt 42- When the belts are shifted toward the left side of the machine so that the crossed belt 41 the front of the machine and causing the carriage 19 to travel to the right. When the carriage 19 reaches the limit of itstravel to the right the belts 41 and42 are again automatically shifted and the direction of 43 and 44 are dogs adjustable in the slot i 45 in the reciprocating carriage 19. The

dog's'43 and 44 are secured in position by means of hand nuts 46 threaded on the bolts 47 the heads48 of which fit into the slot 45. v49 is a lever secured on theforward'end of the shaft 50. The forward end of the shaft 50 is journaled through the front part ported by the. lug 51. The shaft 50 has an arm 52 which is connected with the shifter 53 having members 54 and 55 for controlling thebelts 41 and I .k

w 56 is a finger pivoted in the lever 49 and projecting ,inwardly toward the carriage ormall the, shifter 53 is in position as i 3 with the belts running on riage 19 reaches the limit of its travel to the 'rightthe dog-43 engages-the finger 56 and the. upper partof the ,lever 49 is ,pushed plished slightly to the ri ht of a vertical position. The movement 0 the lever rocks the shaft 50 which, in connection with the automaticshiftin device hereinafter described, moves the shi ter 53 a sufficient distance to the left 10 of its normal position to cause the belt 41 to run on the pulley 38 and the belt 42 to run on the pulley 39 thereby reversing the direction of travel of the carriage19. Just before the carriage 19 reaches the limit of its 5 travel to the left the dog44 engages the finger 56 and the upper end of the lever 49 is pushed slightly to the left of a vertical position again rocking'the shaft 50 which, in

connection with the automatic shifting de- 30 vice hereinafter described, moves theshifter 53 a sufficient distance to the right of its normal position to cause the belt 42 to run on the pulley 38 and the belt 41 on the pulley 37 again reversing the direction of the 35- travel of the carriage 19.

To adjust the knife holding. bar 22, the

'carriage19should be brought to a stop with the knife holding bar at the left. of the grindin wheel. This is readily accom- %)y raising the finger 56 and allowmg the dog 44 to pass. The lever 49 is then shlfted by hand to its normal or vertical position and \the carriage will stop. The knife holding bar can then be easil adjusted toany desired angle. After the ar is adjusted to the desired position the lever is shifted to the left,-the finger 56 is againraised allowing the dog 44 to pass to the right after which it is allowed to drop back to its normal position so that it will engage the dogs 43 and 44 with each movement ofthe carriage to the'right or to the left. The lever 49 is provided with a suitable handle 58.

In order to shift t belts 41 and 42 to the pro er positions, it is necessary to move the shi er 53.farther to the right or left of its normal position than it is moved by the dogs 43 and 44. To accomplish this I provide on the shaft 50, an arm 59 which is secured tothe shaft by any suitable means as by --pin 60. Pivote-d to one endof said arm. on pivot 61, is an intermediate arm 62.

63 is a rod or bolt pivoted to the main frame of the machine 'on pivot 64 and taking through one end .65 of the intermediate arm 62, and which may be provided at its end with a stop as the nuts 66. 67 is a spring engaging the head 68 of the rod or bolt 63 and the shoulder 69 of the intermediate arm.

Byshifting the up er end of the lever 49 slightly. to the rig t of a vertical position the lower end of the arm 59 is moved to a point slightly to the left of the line A A of theline A A and thespring 67 again' compressed. .T he pressure of the spring 67 against the intermediate arm 62 again forces the arm upward on the rod or bolt 63 thus moving the lower end of the arm '59 farther t0 the right of the line A A rocking the shaft 50 and moving the shifter 53 the required distance to the right. This operation is repeated with each movement of the carriage to the right or to the left.

70 is a feed wheel journaled on the feed screw 71 threaded in the nut 72 which is secured to the grinding head 2.

73 is a double arm loosely mounted on the feed screw 71 and has pivoted to its lower end on pivot 74 one end of a link 75. The opposite end of the link 75 is connected with the lever 49 and is adjustable vertically of said lever in the slot 76 and is secured in position by means of a hand nut 77 threaded on the bolt 78 the head of which is fitted into the slot 76.

79 is a pawl pivoted to the arm 73 on pivot 80 and which engages the teeth 81 in the faceof the' feed wheel 70. The feed wheel .70 has a recess 82 in which is an annular groove, 83.

84 is an apron fitting into the recess, covering the groove, and extending over the groove by the lug 88.

face of the feed wheel 70.

85 is a bolt with a wedge shaped head 86 having threaded on its outer end a'hrmd nut 87. The bolt is held in position in the hand nut 87 the apron is firmly secured in position.

. The distance which the feed wheel is revolvedby each movement of the pawl 79 is determined by the position of the link 75 on the lever 49. By adjusting the link 75 downwardl on the lever the dlstance which means of the-link 75 and the double arm 73 is also moved to the right. When the the feed screw 71. When the dog 43 pushes the lever 49 to the right, the pawl 79 by dog 44 pushes thelever 49- to the left the pawl is also moved to the left and it being then in engagement with the teeth 81 in the feed wheel, the feed wheel is revolved a corresponding distance and the grinding any suitable means.

By tightening i he 'wheel is fed toward the work. This operation is continued until the apron 84 is interposed between the pawl 79 and the teeth 81 when the feed automatically ceases.

.The feed wheel "is provided with a I scale by which the apron 84 may be set so that it will be interposed between the pawl 79 and the teeth 81 for stop ing the feed at apredetermined point. e T e wheel 70 is also provided with a handle 89 so that it may be turned by hand when desired.

90 is ,a cover for the grinding wheel which is rigidly secured to the main frame 1 by One side of the lever 91 is removable so as to permit of easy access to the grinding wheel 7. For holding the removable side 91 of thecoverin posi-' tion, I provide a groove in its lower edge which fits over the stationary part of the cover, and a bolt 92 pivotedon a pivot 93 on the top of the cover 90 and arranged to pass through the slot 94 in the removable side 91 of the cover, said bolt having threaded on its outer end-a hand nut 95 which fits against the removable side 91 of the cover and holds it firmly in position.

To remove the part 91 of the cover, the

hand nutis loosened and the bolt 92 raised on its pivot until it is clear of the slot when the removable side 91 of the cover may belifted from its position. I also pro-' .vide openings 96 in the cover to allow of the movement-backward and forward of the grinding wheel on its mandrel within said cover; 7

97 is a reservoir cast in the frame of the .machine immediately under the grinding wheel 7.

98 is a centrifugal pumpinto which the water passes from the reservoir 97 from which it passes into ,the hose 99 which car.- ries it over the cover 90 to the opening 100 from which it is discharged onto the grinding wheel 7 The water is then caught in the trough 101 in the reciprocating carriage 19 from which it passes through the opening 102 into the trough 103. in the carriage support 17, thence through the opening 104 into the reservoir 97.

105 is a stop cock for of the water.

The pump 98 is driven b means of a pulley 1 06 supported in brac et 107 which receives the belt 108 from the pulley 109 controlling the flow secured on the main feed shaft '10 in the frame of the machine. 1

The operation of m improved machine may be briefly desori ed as follows: The knife to be ground is first clamped onto the 'knife holding bar 22 and the bar is then adjusted in'position with its knife holding edge above or below the plane of its axis according to the bevel tobe'ground on the knife The operator then moves the inding wheel 7 up to the knifeand adjusts the I apron 84 on the feed wheel 76 for stopping the feed at the desired point. The machine is then set in motion and the inding wheel is caused to revolve in the direction of the arrow in Fig. 4. The crossed and open belts 41 and 42 cause the rotation of the shaft 31 which latter, by means of the worm and worm wheel and the rack and pinion causes the carriage to reciprocate in front of the grinding wheel. Just before the carriage reaches; the limit of its .travel to the right, the dog'43 engages the finger 56 and the upper part of the lever 49 and the pawl 79 are moved to the right and the direction of the travel of the carriage is reversed. The carriage then travels to the left until the dog 44 engages the finger 56 and the upper part of the lever 49 and the pawl 79 are moved to the left and the pawl 79 bewithout changing its position on the'knife what I claim and desire to ing then in engagement with the teeth 81 revolves the feed wheel a distance corresponding to the movement of the pawl and the grinding wheel 7 is fed toward the work. The movement of the lever again reverses the direction of travel of-the car riage. This operation .is continued until the apron 84 is interposed between the pawl 79 and the teeth 81 when the feed is automatically stopped. A bevel may then be ground fromthe oppositeface of the knife holding bar by readjusting the knife holding bar according'to the bevel desired and repeating the operation. already described.

Having fully described my invention,

ters Patent-is: a

1. In a knife grinding machine, the combination of a. grinding wheel, a reciproeating carriage, a knife holding bar pivoted 1n the carriage and adjustable into positions for grinding theknife on both sides without -esctting it on' the. knife holding bar.

2. "In a grinding machine the combination of a grinding wheel, a reciprocat secure by Let-- ing carriage, a knife holding bar pivotally mounted in said carriage and adapted to hold either plain or slotted knives, means for clamping the knife on the knife holding bar, means for adjusting said barso that v.the knife may be brought into position to be ground from either one or both sides without changing its position on the knife holding bar, substantially as described.

3. In a grinding machine the combination of a rinding wheel, a movable support there or, a stationary cover for the therefor, a reciprocating carriage, a mife holding bar ipivotally mounted-1n thecarriage, a kni e holding face arranged-adjacent to the inding wheel and adapted to hold either p ain or slotted knives, clamps covering said knife holding face for clamping the knife, means for adjusting said bar so that the knifemay' be ground from either' one or both sides without changing its position on said knife holding bar, means for automatically feeding the grinding wheel toward the knife and means for automatically stopping the feed at a predetermined point, substantiallv as described.

In testimony whereof, I have subscribed my name hereto in the presence of two subscribing witnesses. 7 PETER A. SOLEM. Witnesses: a y

' WM. S. Wmmms, RICHARD D'. Conn. 

